Source SDK Release Notes
Source SDK Update 06/23/2010
'Half-Life 2', 'Episode 1', 'Episode 2', and 'Counter-Strike: Source' now default to 'Source Engine 2009'.
Users developing content for these games should manually add configurations for these games in the context of the 'Source Engine 2009' engine or can simply use the 'Reset Game Configurations' utility.
- See Source SDK Known Issues for a list of existing issues with this release.
- See the Source SDK release notes archive for information on previous releases.